Door-spring



M F.S.TAGGAR T.

"DOOR SPRING. No. 246,351. Patented-Aug. 30,1881.

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FRANCIS S. TAGGART, OF FREEPORT, ILLINOIS.

DOOR-SPRING.

SPECIFICATION forming part of Letters Patent No. 246,351, dated August30, 1881.

Application filed February 24, 1881..

To all whom it may concern Be it known that I, FRANCIS S. TAGGART, ofthe city of Freeport, in the county of Stephenson and State of Illinois,haveinvented a new and useful Improvement in Door-Springs, of which thefollowing is a specification, reference being had to the accompanyingdrawings.

My invention relates to that class of doorsprings formed of coiled wirein which the diverging ends of the wire form arms for attachment to thedoor and jamb, ,to the former of which is applied through the arms theactuating force derived from the elasticity of the compressed coil.

The invention is shown in detail in the accompanying drawings, in whichFigure 1 shows the spring applied to the door. Fig. 2 is the core of thespring. Fig. 3 shows the springs detached. FigAEshows the doormaintained in a closed position by the spring, and Fig. 5 shows the doormaintained in an open position, the two latter being -top views, likeletters indicating like parts in the different figures.

A A are two coils of wire, one end of the wire in each coil divergingfrom the coil to form the arms a b, one of which is preferably shorterthan the other, both being bent at right angles near their extremitiesto form shanks for attachment to the door and jamb. The other end of thewirein each coil is bent so as to extend transversely across the openingof the coils, as at c c, the bent ends being of a length equal to thediameter of the coils.

B is a core, thebodyof which is of the proper size to fit easily in thecenter of the coils. At each end of the core is a shoulder, d, slightlylarger than the interior diameter of the coils. Extending transverselyacross each end of the core is a slot. The coils A A are slipped upon(MOdeL) the core so that the ends from which the arms a Z) diverge arein juxtaposition, the coils and the core being adjusted at such lengthsthat the coils fill the body of the core between the shoulders. Theelasticity of the coils permits them to pass over the shoulders d d, andis sufficient to secure them upon the core. The ends 0 c of the wiresengage in the slots at either end of the core and secure the coils fromturning thereon. This manner of securing the coils upon the core has anadvantage over the method of inserting the ends of the wire in holes inthe core, in that in the latter the coil cannot be first formed andafterward placed upon the core. The coils are wound upon the core inopposite directions, so that as the arms a Z) vibrate toward or fromeach other the coils are compressed or expanded simultaneously. Theshort arm I) is attached to the door and the long arm a to the jamb insuch a manner that the opening of the door spreads the arms andcompresses the springs, the actuating force derived fromthe tension ofwhich operates through thearms to resist the opening of the door untilthe point to which the poweris applied has passed the center'aroundwhich it operates when the force of the spring operates to retain the,door open, as shown in Fig. 5.

WVhat I claim as my invention, and desire to secure by Letters Patent,is

In a door-spring, the combination of two coiled-wire springs with acentral core provided with shoulders at its extremeties, and withslotted ends for the purpose of securing the coils upon the core,substantially as and for the purposes set forth.

FRANCIS S. TAGGART. lVitnesses:

O. G. LATHROP, T. S. E. DIXON.

